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Deluxe Digital Non-Programmable Thermostat (RTHL3550D)

The Deluxe Digital Non-Programmable Thermostat offers easy push-button operation and premium features such as Auto Stop and precise comfort control. It’s a thermostat that’s easy to use with some nice functionality that you’ll appreciate.

Our Deluxe Digital Non-Programmable Thermostat is easy to use with a large, backlit digital display and push-button operation. It also has a more sophisticated side, with features such as changing from heat to cool automatically, precise comfort control and an ability to set minimum cool/maximum heat temperature settings.

Easy to use

Large backlit digital display

Display options — degree Celsius or Fahrenheit temperature

Easy-access battery replacement

Set point retained in memory (in the event of power outage)

One-year warranty

DIY installation

Precise Comfort Control

Within +/-1 degree F for maximum comfort

Temperature Range Limits

Set minimum cool and maximum temperature settings

Auto Change

Go from heat to cool automatically

Model/Sku #

Model number: RTHL3550D

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Digital Non-Programmable Thermostat FrontView

Digital Non-Programmable Thermostat FrontView

Digital Non-Programmable Thermostat FrontView

Digital Non-Programmable Thermostat FrontView

Deluxe-Digital-Non-Programmab-RTHL3550D

Digital Non-Programmable Thermostat FrontView

Digital-NonProgrammable-FrontView

Digital Non-Programmable Thermostat FrontView

Digital-NonProgrammable-FrontView

Digital Non-Programmable Thermostat FrontView

Digital-NonProgrammable-FrontView

Digital Non-Programmable Thermostat FrontView

Digital-NonProgrammable-FrontView

Digital Non-Programmable Thermostat FrontView

Digital-NonProgrammable-FrontView

Compatible with systems

This thermostat is compatible with heating and cooling systems and heat pumps.

It is not compatible with electric baseboard heat (120/240V).

Follow the quick installation guide that comes with the Deluxe Digital Non-Programmable Thermostat RTHL3550D. If you misplaced this guide, you can find it in the resources section below. Installation is fast and easy. Remove your old thermostat, but be sure to label the wires. Install and wire your new thermostat. Set your new thermostat to match your heating/cooling system.